<html>  
  <head>  
        <meta charset="utf-8">  
        <title>3.3 Hello,World</title>  
  </head> 
<body>

<p>Cat</p>
<p>Dog</p>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> 
<script>  
var p = d3.select("body").selectAll("p").text("Hello, World");      
p.style("color","red");
p.style("font-size","72px");
</script> 

</body>

</html>